Maico MB 11 Classic, Руководство по эксплуатации

Страница: 35 / 72

Operation Manual MB 11 Classic
8100498-4_OM_MB11_Classic_3.18_EN_16a.docx 33 01/16
6 Automatic testing in the automated ABR screening mode
It is fast and easy to screen patients with the built-in patented automatic Fast
Steady State Algorithm. At the conclusion of the test or when the test is
manually terminated, one of the following results will display and be saved
with the screening.
Test Result Definitions
PASS:
As soon as the indication mark reaches the green area (has met the
Pass criteria), the result is "PASS".
REFER: If no response at the test level of 35 dB nHL is present after 180
seconds of data collection, the test is automatically terminated with a
"REFER" result. In this case, follow your screening program protocol to
determine whether another screening should be performed or whether the
baby will be referred for a diagnostic follow-up test.
ABORT:
If the test is aborted (“Stop Measurement” is pressed during the
test), the test is labeled as “ABORT”. If any tracking is enabled, then a pop-
up window appears for selection of a reason for stopping the test.
6.1 Preparing the Patient for measurements
Optimal ABR recording requires low skin-electrode resistance (electrode
impedance).
To achieve low electrode impedance, the skin in the location where the
disposable electrodes will be applied must be cleaned with an electrode skin
preparation product. After cleaning, the residue of this cleaning product
should be wiped away so that the skin is dry to promote optimal adhesion
of the electrode to the skin.
Electrodes will be placed on three locations on the patient’s head, i.e. the
center of the forehead at the hairline, the side of the forehead near the
temple (or, alternatively, on the cheek) and the nape of the neck (or,
alternatively, the right mastoid).
When the adhesive EarCups, around-the-ear couplers, are used with the
insert earphones to deliver the acoustic stimulus, the nape of the neck
electrode position should be used rather than a mastoid placement. The
placement of the EarCups around the ears makes mastoid placement of the
electrode impossible.
The patient should be made as comfortable and relaxed as possible to
minimize any potential muscle artifacts and ensure optimum test outcome
in the shortest time.
Make sure that the face, neck and shoulder of the patient are relaxed.